Improvement in lubricating compounds



UNITED STATES PATENT. OFFICE.

HENRY V. P. DRAPER, OF HANNIBAL, MISSOURI, ASSIGNOR OF ONE-HALF HIS RIGHT TO PETER B. GROAT, OF SAME PLACE.

IMPROVEMENT IN LUBRICATING COMPOUNDS.

Specification forming part 0f Letters Patent No. 171,509, dated December 28, 1875; application filed August 28, 1875.

To all whom it may concern:

Be it known that I, HENRY V. P. DRAPER, a resident of Hannibal, Marion county, Missouri, have invented a new and useful Improvement in Lubricating Compounds, of which the following is a full, clear, and exact description:

My aim is to provide a cheap lubricant that is free from acid and grit, which, in use, does not gum or leave any residuum, and which can endure a high degree of heat.

To prepare the lubricant, take petroleum in any of its commercial forms, or of any degree of purification, and to it add a saturated solution of lime-water. The lime-water is poured into the oil gradually, meanwhile stirrin g constantly, and until the lime solution is thoroughly incorporated in the oil. Add the limewater until the mixture begins to thicken or becomes soapy. The stirring is kept up until the color of the mixture becomes a dark brown. Continued stirring changes it to a dark drab, and then to a light drab. The compound is fit for use as a lubricant when it is of a dark brown color. It is improved by stirring it until the lighter shades appear.

The lime-water is valuable in neutralizing deleterious ingredients found in petroleum. It also renders the lubricant incombustible,

and prevents it from gumming. The precise amount of lime-water to use cannot in advance be named, as different carbon oils take up different quantities of limewvater. If, from standing, the compound becomes too thick, it may be thinned by adding more of the petroleum.

I am aware that, for the purpose of improving the petroleum product in respect to its illuminating qualities, acid has been added thereto, and afterward dry lime. Such a combination, even if new with me, would not answer my present purpose. It is gritty, it decomposes in use, and it leaves an undesirable residuum. I therefore disclaim it; but

Having described myinvention, WhatI claim as new, and desire to secure by Letters Patent, 1s

1. The herein-described lubricant, consisting of petroleum and lime-water combined, substantially as described.

2. The herein-described process ofmanuf'acturing a lubricating compound by adding limewater to petroleum, substantially as and for the purposes set forth.

' H. .V. P. DRAPER. Witnesses:

SAML. S. BOYD, CHAS. D. MooDY. 

